In 1944, the 4th Armored Division played a central role in one of the more remarkable campaigns in American military history-Third Army's pursuit across France, which was capped off by the encirclement and capture of Nancy. In the course of this campaign, the 4th Armored Division practiced a mode of warfare that has since become known to the Army as AirLand Battle. Inasmuch as the encircle ment of Nancy is one of the few historical examples that shows American mechanized forces waging war in accordance with the tenets of AirLand Battle, anyone seeking a deeper appreciation of today's doctrine would do well to study this campaign carefully. The 4th Armored Division in the Encirclement of Nancy originated at the U.S. Army Command and General Staff College as an introductory class for a course on modern division-level operations. It is a companion piece to The Lorraine Campaign: An Overview, September-December 1944, published in February 1985.